Groot (voiced by Vin Diesel)

Rocket’s best buddy and partner in crime, the walking and talking tree-like life-form named Groot, is as powerful as a tank and as gentle as a lamb… until his friends are in danger. Expect big things from this big guy, but don’t expect too many words; the only thing Groot ever says to anyone is “I AM GROOT.” If Rocket is the team’s furry little id, then Groot is their big, weird heart.